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$1,395+ Cheap flights from Colorado to Sidney, MT (SDY)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/30. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SDY
Jan 15 — Jan 221
Thu 1/15
Thu 1/22
1 adult, Economy
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Cheap flight deals from Colorado to Sidney

Cheapest flights from Colorado to Sidney
Explore the most affordable flight options available from Colorado to Sidney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 16, 2025.

This Expedia deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:20 amDEN - SDY
2 stops12h 31mMultiple Airlines
Sat 1/37:35 amSDY - DEN
2 stops13h 53mMultiple Airlines
Deal found 12/15$1,395

Find flight deals from Colorado to Sidney

Keep the following information in mind while searching for Colorado to Sidney flight deals. Data was last updated December 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$1,395
(Expedia)
Provider with most accurate pricing for Denver Intl-Sidney Richland Municipal flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-Sidney Richland Municipal flights.
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From Colorado to Sidney Richland Municipal
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Colorado to Sidney that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 16, 2025.
Use the filters below to find and compare flights from Colorado to Sidney that are best for you.

Fly from

Colorado

Fly to

Sidney

Route

Depart

Return

Price

DenverSidney

DEN - SDY

DENSDY

Denver Intl

Tue 12/30

7:20 am-7:51 pm

2 stops12h 31m

Sidney Richland Municipal

Sat 1/3

7:35 am-9:28 pm

2 stops13h 53m

$1,395

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Best time to book a flight from Colorado to Sidney

Have a flexible travel schedule? Discover the best time to fly to Sidney from Colorado with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Colorado to Sidney

What is the cheapest month to book a flight from Colorado to Sidney, Montana?

Currently, April is the cheapest month in which you can book a flight from Colorado to Sidney, Montana (average of $152). Flying from Colorado to Sidney, Montana in July is currently the most expensive (average of $326). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Colorado to Sidney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Sidney from Colorado?

    For a flight from Colorado to Sidney, you will be flying into Richland Municipal. Sidney Richland Municipal (SDY) is just 1.8 mi from the center of the city.

  • Can I find deals for flights from Colorado to Sidney that include hotel bookings?

    Yes. In addition to deals on Colorado to Sidney flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Colorado to Sidney?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Colorado to Sidney.

  • Can I find deals for business class flights from Colorado to Sidney?

    Yes. Cheapflights offers flight deals from Colorado to Sidney by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Colorado to Sidney, Montana?

    Currently, April is the cheapest month in which you can book a flight from Colorado to Sidney, Montana (average of $152). Flying from Colorado to Sidney, Montana in July is currently the most expensive (average of $326). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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